【摘要】：循環(huán)荷載作用下飽和軟黏土將產(chǎn)生應(yīng)變軟化現(xiàn)象,通過對寧波飽和軟黏土開展溫控動三軸試驗,研究了溫度、頻率、初始偏應(yīng)力、動應(yīng)力和含水率對土體應(yīng)變軟化的影響,并在試驗基礎(chǔ)上建立了一個能夠考慮溫度影響的應(yīng)變軟化模型。結(jié)果表明:隨著振動次數(shù)、初始偏應(yīng)力、動應(yīng)力和含水率的增加,土體軟化加快,軟化指數(shù)逐漸減小;隨著頻率和溫度的提高,土體軟化程度降低,軟化指數(shù)增大;建立的軟化模型可以較為合理地描述試驗溫度、頻率、初始偏應(yīng)力、動應(yīng)力和含水率對土體應(yīng)變軟化特性的影響。
[Abstract]:Strain softening will occur in saturated soft clay under cyclic loading. The effects of temperature, frequency, initial deflection stress, dynamic stress and moisture content on strain softening of saturated soft clay in Ningbo are studied by temperature controlled triaxial test. On the basis of the experiment, a strain softening model which can take into account the influence of temperature is established. The results show that with the increase of vibration frequency, initial deflection stress, dynamic stress and moisture content, soil softening accelerates and the softening index decreases gradually, and with the increase of frequency and temperature, the softening degree decreases and the softening index increases. The softening model can reasonably describe the effects of temperature, frequency, initial deflection stress, dynamic stress and moisture content on the strain softening characteristics of soil.
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本文編號：2254546